CN103100656B - A kind of preparation method of quick-drying full-mold casting coating - Google Patents
A kind of preparation method of quick-drying full-mold casting coating Download PDFInfo
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- CN103100656B CN103100656B CN201210531060.7A CN201210531060A CN103100656B CN 103100656 B CN103100656 B CN 103100656B CN 201210531060 A CN201210531060 A CN 201210531060A CN 103100656 B CN103100656 B CN 103100656B
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Abstract
The invention discloses a kind of preparation method of quick-drying full-mold casting coating, formed by following component in weight portion: silica flour 65-75 part, plant ash 5-7 part, schmigel 10-12 part, sodium bentonite 10-12 part, nano-attapulgite 4-6 part, lignin sulfonic acid 1-2? part, polyvinyl alcohol 0.8-1.5 part, starch paste 5-7 part, Ludox 1.4-1.6 part, nanometer scale ceramics powder 1-2 part, ferric oxide red powder 0.5-0.8 part, water 525-535 part, binding agent is made up of normal temperature binding agent and high-temperature agglomerant, the mass ratio of wherein said normal temperature binding agent and described high-temperature agglomerant is 2:3. coating of the present invention all has quick-drying, good gas permeability and drip-dry full-mold casting coating under high temperature, low temperature environment, can meet heavy castings production requirement.
Description
Technical field
The present invention relates to casting field, particularly a kind of preparation method of quick-drying full-mold casting coating.
Background technology
The disperse system that full-mold casting coating is made up of the material of multiple different in kind, its composition mainly comprises the compositions such as refractory material, binding agent, carrier, nano-attapulgite and special additive, needs coating have good processing performance, service behaviour, quality stability and apply reappearance. Full-mold casting coating is coated in the outer surface of foamed polystyrene pattern, could moulding cast after coating is dry. Foamed plastics is airtight, and heat distortion temperature low (approximately 70 DEG C of left and right) is poor to the affinity of water; Liquid residue after foamed plastics melted by heating, gasification is many, and gas forming amount is large, if these gases and liquid residue can not be discharged in time, foundry goods will produce the carbon defects such as gas, carburetting, Surface Wrinkle in iron. These features have determined that full-mold paint should possess following performance requirement, and coating should have good wetability and being coated with property, good high-temperature resistant property and elevated temperature strength and good hot permeability.
The resistance to elevated temperatures of the cast paint of prior art is poor, can only be applicable to shorter finding of high-temperature process time (in 200kg) and produce, and can not adapt to for the production of heavy castings (in 20 tons) and small lot handwork. Have the production technology that resistant to elevated temperatures performance can be applicable to heavy castings, but its manufacturing cost is higher, and can not be applicable to manual brushing, this coating is black, easily causes the image of working environment black pollution.
Summary of the invention
For the deficiencies in the prior art, the object of this invention is to provide a kind of preparation method of quick-drying full-mold casting coating, under high temperature, low temperature environment, all there is quick-drying, quick-drying, good gas permeability and drip-dry full-mold casting coating, can meet heavy castings production requirement.
Technical scheme of the present invention is as follows:
A preparation method for quick-drying full-mold casting coating, is made up of following component in weight portion: silica flour 65-75 part, plant ash 5-7 part, schmigel 10-12 part, sodium bentonite 10-12 part, nano-attapulgite 4-6 part, lignin sulfonic acid 1-2 part, polyvinyl alcohol 0.8-1.5 part, starch paste 5-7 part, Ludox 1.4-1.6 part, nanometer scale ceramics powder 1-2 part, ferric oxide red powder 0.5-0.8 part, iron ore tailings 3-5 part, waterglass 2-3 part, water 55-65 part, described preparation method comprises the steps:
1) plant ash is soaked to 3-4 hour with 10-15% sulfuric acid, deionized water washing, soak 3-4 hour with 10-12% sodium hydroxide solution again, extremely neutral with deionized water washing again, then at 500-530 DEG C, calcine after 2-3 hour, add the starch paste, the NaOH powder of 5-9%, the rear pelletizing of suitable quantity of water mixing that are equivalent to its weight 5-8% to be broken into modification plant ash particle;
2) modification plant ash particle above-mentioned steps being obtained mixes with the water of nano-attapulgite, 1/3 weight, stirs and is heated to 150-160 DEG C, insulation 1-2 hour, stove is chilled to 50 DEG C, is incubated 2 hours, then is heated to 100-120 DEG C, be incubated 1 hour, be cooled to normal temperature with 20 DEG C/h;
3) schmigel of above-mentioned weight portion, sodium bentonite, nanometer scale ceramics powder, starch paste, polyvinyl alcohol are mixed with the water of 1/4 weight, and fully stir, then leave standstill 40-60min, be then slowly heated to 75-85 DEG C and fully stirring;
4) by step 2) water of product, step 3) product, silica flour, Ludox, ferric oxide red powder, iron ore tailings, waterglass, residuals weight adds in reactor, open reactor, mixing speed is: 110-120r/min, in stirring downhill reaction still, add other raw material, heat simultaneously the temperature of reactor is slowly risen to 75-85 DEG C, constant temperature stirs 14-18min, grind.
Compared with prior art, the present invention has following beneficial effect:
1) on the basis of great many of experiments, determine the composition of aggregate, nano-attapulgite, bonding agent and auxiliary material of coating and content separately, make the effect between above-mentioned each component reach collaborative, the combination property of coating is improved. Full-mold casting coating of the present invention had both reached high anti-stick sand ability, rigidity and the resistance to elevated temperatures of raising apperance, minimized cost again. Through the optimization allotment of aggregate and various additives, form high current sex change fluid, all reach better state with foamed polystyrene pattern wetability and brushability. Facts have proved, this coating just can reach the above paint thickness of 1.7mm through 2 times brushings, and the anti-stick sand that can meet heavy castings requires and carry needs.
2) full-mold casting coating of the present invention, has good suspension and thixotropy, also has good gas permeability and higher surface strength, and preparation technology is simple, easy to operate, abundant raw materials, production cost are low. Bright and clean with the full mold cast(ing) surface of its production, without carbon defects such as elephant skin; Coating is easy to peel off, and is convenient to cleaning.
Detailed description of the invention
A preparation method for quick-drying full-mold casting coating, in weight portion (kilogram) formed by following component: 75 parts of silica flours, 7 parts of plant ash, 12 parts of schmigels, 12 parts of sodium bentonites, 4 parts of nano-attapulgites, 2 parts of lignin sulfonic acids, 0.8 part of polyvinyl alcohol, 7 parts of starch pastes, 1.6 parts of Ludox, 1 part, nanometer scale ceramics powder, 0.8 part of ferric oxide red powder, 5 parts of iron ore tailings, 2 parts of waterglass, 65 parts, water, preparation method comprises the steps:
1) plant ash is soaked to 3-4 hour with 15% sulfuric acid, deionized water washing, soak 3-4 hour with 10-12% sodium hydroxide solution again, extremely neutral with deionized water washing again, then at 500-530 DEG C, calcine after 2-3 hour, add the starch paste, 9% NaOH powder, the suitable quantity of water that are equivalent to its weight 5% to mix after pelletizing be broken into modification plant ash particle;
2) modification plant ash particle above-mentioned steps being obtained mixes with the water of nano-attapulgite, 1/3 weight, stirs and is heated to 150-160 DEG C, insulation 1-2 hour, stove is chilled to 50 DEG C, is incubated 2 hours, then is heated to 100-120 DEG C, be incubated 1 hour, be cooled to normal temperature with 20 DEG C/h;
3) schmigel of above-mentioned weight portion, sodium bentonite, nanometer scale ceramics powder, starch paste, polyvinyl alcohol are mixed with the water of 1/4 weight, and fully stir, then leave standstill 40-60min, be then slowly heated to 75-85 DEG C and fully stirring;
4) by step 2) water of product, step 3) product, silica flour, Ludox, ferric oxide red powder, iron ore tailings, waterglass, residuals weight adds in reactor, open reactor, mixing speed is: 110-120r/min, in stirring downhill reaction still, add other raw material, heat simultaneously the temperature of reactor is slowly risen to 75-85 DEG C, constant temperature stirs 14-18min, grind.
Utilize the suspensibility that coating prepared by method of the present invention was placed after 42 hours to be greater than 94%; The shear stress of coating is limited to 18-22Pa; Be 42-45s with being coated with the apparent viscosity value of 4 viscometer determining coating, thixotroping rate 15-18%, the brushing index of coating, drips the amount of dropping down and drips the time of dropping down and be respectively 5.8,0.6g and 9s. The normal temperature strength of coating is higher than 690g/mm. After 1200 DEG C of roastings, the intensity of paint coatings is higher than 490g/mm. The normal temperature gas permeability of coating is higher than 12cm2·（kPa·min）-1, hot permeability is greater than 22cm2·（kPa·min）-1。
Claims (1)
1. the preparation method of a quick-drying full-mold casting coating, it is characterized in that, this coating is prepared by the raw material of following weight portion: silica flour 65-75 part, plant ash 5-7 part, schmigel 10-12 part, sodium bentonite 10-12 part, nano-attapulgite 4-6 part, lignin sulfonic acid 1-2 part, polyvinyl alcohol 0.8-1.5 part, starch paste 5-7 part, Ludox 1.4-1.6 part, nanometer scale ceramics powder 1-2 part, ferric oxide red powder 0.5-0.8 part, iron ore tailings 3-5 part, waterglass 2-3 part, water 55-65 part, described preparation method comprises the steps:
1) plant ash is soaked to 3-4 hour with 10-15% sulfuric acid, deionized water washing, soak 3-4 hour with 10-12% sodium hydroxide solution again, extremely neutral with deionized water washing again, then at 500-530 DEG C, calcine after 2-3 hour, add the starch paste, the NaOH powder of 5-9%, the rear pelletizing of suitable quantity of water mixing that are equivalent to its weight 5-8% to be broken into modification plant ash particle;
2) modification plant ash particle above-mentioned steps being obtained mixes with the water of nano-attapulgite, 1/3 weight, stirs and is heated to 150-160 DEG C, insulation 1-2 hour, stove is chilled to 50 DEG C, is incubated 2 hours, then is heated to 100-120 DEG C, be incubated 1 hour, be cooled to normal temperature with 20 DEG C/h;
3) schmigel of above-mentioned weight portion, sodium bentonite, nanometer scale ceramics powder, starch paste, polyvinyl alcohol are mixed with the water of 1/4 weight, and fully stir, then leave standstill 40-60min, be then slowly heated to 75-85 DEG C and fully stirring;
4) by step 2) water of product, step 3) product, silica flour, Ludox, ferric oxide red powder, iron ore tailings, waterglass, residuals weight adds in reactor, open reactor, mixing speed is: 110-120r/min, in stirring downhill reaction still, add other raw material, heat simultaneously the temperature of reactor is slowly risen to 75-85 DEG C, constant temperature stirs 14-18min, grinds.
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| CN201210531060.7A CN103100656B (en) | 2012-12-11 | 2012-12-11 | A kind of preparation method of quick-drying full-mold casting coating |
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| CN201210531060.7A CN103100656B (en) | 2012-12-11 | 2012-12-11 | A kind of preparation method of quick-drying full-mold casting coating |
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| CN103100656B true CN103100656B (en) | 2016-05-18 |
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| CN103394634B (en) * | 2013-08-13 | 2015-03-25 | 赵溶 | Environment-friendly water-based particle casting coating and preparation method thereof |
| CN104475667A (en) * | 2014-10-08 | 2015-04-01 | 铜陵瑞莱科技有限公司 | Zircon coating and manufacturing method thereof |
| CN104475668A (en) * | 2014-10-08 | 2015-04-01 | 铜陵瑞莱科技有限公司 | Cristobalite/graphite composite casting coating and manufacturing method thereof |
| CN104475664A (en) * | 2014-10-08 | 2015-04-01 | 铜陵瑞莱科技有限公司 | Building gypsum/attapulgite composite casting coating and manufacturing method thereof |
| CN104475666A (en) * | 2014-10-08 | 2015-04-01 | 铜陵瑞莱科技有限公司 | High temperature resistant environmentally-friendly casting coating and manufacturing method thereof |
| CN104475670A (en) * | 2014-10-08 | 2015-04-01 | 铜陵瑞莱科技有限公司 | Modified municipal sludge casting coating and manufacturing method thereof |
| CN104386947A (en) * | 2014-10-13 | 2015-03-04 | 合肥庭索环保材料有限公司 | Anti-sticking sandy thermal-insulation paint for exterior wall |
| CN105328114A (en) * | 2015-11-02 | 2016-02-17 | 广西博白县三田机械制造有限公司 | Fire-proof coating used for die casting |
| CN107175312A (en) * | 2017-05-24 | 2017-09-19 | 禹州市伟朔机械制造厂 | A kind of modified alcohol-base foundry coating |
| CN107971456A (en) * | 2018-01-17 | 2018-05-01 | 重庆卡森科技有限公司 | A kind of multi-functional cast paint |
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| DE102004044662A1 (en) * | 2004-09-15 | 2006-03-30 | Ashland-Südchemie-Kernfest GmbH | Thixotropic coating compositions |
| JP2010131665A (en) * | 2008-12-08 | 2010-06-17 | Okazaki Kosanbutsu Kk | Facing material for casting |
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| CN101497104A (en) * | 2009-03-11 | 2009-08-05 | 杨玉光 | Lost foam paint and method for producing the same |
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Effective date of registration: 20180316 Address after: 510000 Guangdong Province, Guangzhou high tech Industrial Development Zone, No. 233 science road 231 floor B1B2 building one layer, two layer, three layer, four layer Patentee after: GUANGZHOU BOAO ZONGHENG NETWORK SCIENCE & TECHNOLOGY CO., LTD. Address before: Wuhu City, Anhui province 241007 yeatan Jiujiang Road Economic Development Zone No. 5 Patentee before: Wuhu Hengkun Auto Parts Co., Ltd. |
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Effective date of registration: 20190724 Address after: 214533 No. 25 Dongxing Town North Road, Jingjiang City, Taizhou City, Jiangsu Province Patentee after: Jiangsu Huaye Special Steel Manufacturing Co., Ltd. Address before: 510000 Guangdong Province, Guangzhou high tech Industrial Development Zone, No. 233 science road 231 floor B1B2 building one layer, two layer, three layer, four layer Patentee before: GUANGZHOU BOAO ZONGHENG NETWORK SCIENCE & TECHNOLOGY CO., LTD. |
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Granted publication date: 20160518 Termination date: 20191211 |